Vacuum cleaner



FIG. 1 is a front elevational view of a vacuum cleaner showing our new design; FIG. 2 is a top plan view thereof; FIG. 3 is a rear elevational view thereof; FIG. 4 is a bottom plan view thereof; FIG. 5 is a left side elevational view thereof; FIG. 6 is a right side elevational view thereof; FIG. 7 is a cross-sectional view thereof, taken along line 7—7 in FIG. 1; FIG. 8 is a front perspective view thereof; and, FIG. 9 is a rear perspective view thereof. 

The ornamental design for a vacuum cleaner, as shown and described. 